refresh query plan expiration on GET

[Geal]

Fix #4473
We want the query plan cache to act like a LRU, so if a TTL is set in its Redis configuration, we will reset the plan cache key's current expiration when reding it

unclear to me here: should we instead make it an option on the common redis configuration type? We may want to control that behaviour for APQ and introspection too This is now part of the common redis configuration and defaults to true. For entity caching, this option is disabled, as the cache will manage TTL directly

Tests now require REdis 7. Otherwise you will get the error "ERR unknown command EXPIRETIME"

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Complete the checklist (and note appropriate exceptions) before the PR is marked ready-for-review.

• Changes are compatible¹
• Documentation² completed
• Performance impact assessed and acceptable
• Tests added and passing³
  • Unit Tests
  • Integration Tests
  • Manual Tests

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2. Configuration is an important part of many changes. Where applicable please try to document configuration examples. ↩

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[router-perf]

CI performance tests

• const - Basic stress test that runs with a constant number of users
• xlarge-request - Stress test with 10 MB request payload
• events_big_cap_high_rate_callback - Stress test for events with a lot of users, deduplication enabled and high rate event with a big queue capacity using callback mode
• events - Stress test for events with a lot of users and deduplication ENABLED
• large-request - Stress test with a 1 MB request payload
• events_without_dedup - Stress test for events with a lot of users and deduplication DISABLED
• reload - Reload test over a long period of time at a constant rate of users
• step - Basic stress test that steps up the number of users over time
• no-graphos - Basic stress test, no GraphOS.
• events_without_dedup_callback - Stress test for events with a lot of users and deduplication DISABLED using callback mode
• events_callback - Stress test for events with a lot of users and deduplication ENABLED in callback mode
• step-jemalloc-tuning - Clone of the basic stress test for jemalloc tuning
• events_big_cap_high_rate - Stress test for events with a lot of users, deduplication enabled and high rate event with a big queue capacity
• xxlarge-request - Stress test with 100 MB request payload

[lleadbet]

unclear to me here: should we instead make it an option on the common redis configuration type? We may want to control that behaviour for APQ and introspection too

If possible. The "TTL reset" mechanism is helpful for this use-case imo.

[garypen]

Is there any way we can test this functionality by extending our existing redis integration tests?
also: config feature => changelog?

[Geal]

Probably yes, we can check a key's expiration by querying redis in the test

[bnjjj]

Missing the changelog but LGTM

[Geal]

there is now a test in f08b3ad. Integration tests will require Redis 7 from now on, to have access to the EXPIRETIME command